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Updated: Jul 25, 2026

Writing and Low-Temperature Characterization of Oxide Nanostructures
Published on: July 18, 2014
Electronic transparency of internal interfaces in metallic nanostructures comprising light, heavy and ferromagnetic
Nicolas S Beermann1, Savio Fabretti1, Hassan A Hafez1
1Fakultät für Physik, Universität Bielefeld, Universitätsstr. 25, 33615 Bielefeld, Germany.
Abstract:
We investigate the electronic transport at the internal interface within a selection of metallic bilayer nanostructures using the contact-free, all-optical method of THz time-domain spectroscopy. The Ru/Co, Ru/Pt, and Ru/Al bilayer nanostructures and their individual constituent metals are studied, with Ru representing an archetypal d-band metal, Co an archetypal ferromagnet, and Pt and Al archetypal heavy and light metals, respectively. The THz conductivity data were analyzed in terms of Drude and Bloch-Grüneisen models, and the interface current coefficient of the internal nanointerface was determined. Strong temperature dependency of the interface current coefficient in the Ru/Co nanostructure is revealed.
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